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Diffstat (limited to 'cpp/src/qpid/sys/posix/Module.h')
| -rw-r--r-- | cpp/src/qpid/sys/posix/Module.h | 127 |
1 files changed, 0 insertions, 127 deletions
diff --git a/cpp/src/qpid/sys/posix/Module.h b/cpp/src/qpid/sys/posix/Module.h deleted file mode 100644 index 5a0358a748..0000000000 --- a/cpp/src/qpid/sys/posix/Module.h +++ /dev/null @@ -1,127 +0,0 @@ -#ifndef _sys_posix_Module_h -#define _sys_posix_Module_h - -/* - * - * Licensed to the Apache Software Foundation (ASF) under one - * or more contributor license agreements. See the NOTICE file - * distributed with this work for additional information - * regarding copyright ownership. The ASF licenses this file - * to you under the Apache License, Version 2.0 (the - * "License"); you may not use this file except in compliance - * with the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, - * software distributed under the License is distributed on an - * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY - * KIND, either express or implied. See the License for the - * specific language governing permissions and limitations - * under the License. - * - */ - -#include "qpid/QpidError.h" -#include "qpid/log/Statement.h" - -#include <boost/noncopyable.hpp> -#include <iostream> -#include <dlfcn.h> - -namespace qpid { -namespace sys { - -typedef void* dso_handle_t; - -template <class T> class Module : private boost::noncopyable -{ - typedef T* create_t(); - typedef void destroy_t(T*); - - dso_handle_t handle; - destroy_t* destroy; - T* ptr; - - void load(const std::string& name); - void unload(); - void* getSymbol(const std::string& name); - -public: - Module(const std::string& name); - T* operator->(); - T* get(); - ~Module() throw(); -}; - -template <class T> Module<T>::Module(const std::string& module) : destroy(0), ptr(0) -{ - load(module); - //TODO: need a better strategy for symbol names to allow multiple - //modules to be loaded without clashes... - - //Note: need the double cast to avoid errors in casting from void* to function pointer with -pedantic - create_t* create = reinterpret_cast<create_t*>(reinterpret_cast<intptr_t>(getSymbol("create"))); - destroy = reinterpret_cast<destroy_t*>(reinterpret_cast<intptr_t>(getSymbol("destroy"))); - ptr = create(); -} - -template <class T> T* Module<T>::operator->() -{ - return ptr; -} - -template <class T> T* Module<T>::get() -{ - return ptr; -} - -template <class T> Module<T>::~Module() throw() -{ - try { - if (handle && ptr) { - destroy(ptr); - } - if (handle) unload(); - } catch (std::exception& e) { - QPID_LOG(error, "Error while destroying module: " << e.what()); - } - destroy = 0; - handle = 0; - ptr = 0; -} - -template <class T> void Module<T>::load(const std::string& name) -{ - ::dlerror(); - handle = ::dlopen(name.c_str(), RTLD_NOW); - const char* error = ::dlerror(); - if (error) { - THROW_QPID_ERROR(INTERNAL_ERROR, error); - } -} - -template <class T> void Module<T>::unload() -{ - dlerror(); - dlclose(handle); - const char* error = dlerror(); - if (error) { - THROW_QPID_ERROR(INTERNAL_ERROR, error); - } -} - -template <class T> void* Module<T>::getSymbol(const std::string& name) -{ - dlerror(); - void* sym = dlsym(handle, name.c_str()); - const char* error = dlerror(); - if (error) { - THROW_QPID_ERROR(INTERNAL_ERROR, error); - } - return sym; -} - -}} -#endif //ifndef _sys_posix_Module_h - |
